President Obama's top political guru said Tuesday that he believes 70 House races and 15 Senate races are in play this fall.

White House senior adviser David Plouffe — Obama's 2008 presidential campaign manager — said that a bevy of races were in play, from the national to local level.

"There are a lot of competitive races out there. There's going to be at least 70 House races in play, about 15 competitive Senate races, a couple dozen tough gubernatorial races," he said in a video to supporters of Organizing for America, the president's political arm.